Combination transformation:

Sequences of transformations can be combined into a single transformation using the concatenation process. For example, consider the rotation of a line about an arbitrary point. Line AB is to be rotated through 45 in anticlockwise direction about point A. An inverse translation of AB to A1B1. A1B1 is then rotated through 45 to A2B2. The line A2B2 is then translated to A3B3.